Compressor



G. E. ROBERTS Oct. 17, 1933.

COMPRESSOR Filed May 26, i932 2 Sheets-Sheet 1 /O//QQAM Oct. 17, 1933.G' E. RQBERTS .I 1,931,207

COMPRESSOR Filed May 26, 1932 2 Sheets-Sheet 2 Patented Oct. 17, 1933COMPRESSOR George E. Roberts, Glendale,vCalif., assignor of one-fourthto Rudolph A. Riek and one-fourth to Forest O. Riek, both ofRhinelander, Wis.

Application May 2s, 1932. serial No. 613,735

REISSUED' 1 Claim. (Cl. 230-152) This invention relates to a rotarycompressor and while lt is designed more especially for use in systemsofl mechanical refrigeration, it can also be advantageously employed inhydraulic l transmissions and wherever it may be desired to circulate orcompress fluid in a simple and eflicient manner.

One of the objects of the invention is to provide a rotary compressormade up of the minil mum number of parts, it being possible to readilyassemble them.

Another object is to provide a compressor of this type which will noteasily get out of order, and can be made at low cost.

A still further object is to provide a compressor which will operateeiiiciently at a comparatively slow speed it being possible to obtainefficient results from a 6" rotor operating as low as 60 R. P. M.

l With the foregoing and other objects in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed it i being understood that changes may be made inthe precise embodiment of the invention herein disclosed within thescope of what is claimed without departing from the spirit of theinvention.

In the accompanying drawings the preferred form of the invention hasbeen shown.

In said drawings:

Figure 1 is a central longitudinal section through the compressor.

Figure 2 is a section on line 2 2, Figure 1..

Figure 3 is a section on line 3 3, Figure 2.

Figure 4 is a perspective view of the head of the stator.

Figure 5 is a perspective view of the rotorshowing that face thereofwhich coacts with the head.

Figure 6 is another perspective view of the rotor showing the oppositeface thereof.

Figure 7 is a perspective view of one of the vanes.

Referring to the figures by characters of reference, 1 designates astator which is preferably cylindrical. One end is closed by a head 2which can be integral therewith and provides a bearing for the shaft 3of the rotor. The other or open end of the stator has an annular flange4 to which a removable head 5 is detachably secured by means of bolts orother suitable devices, indicated at 6. This head hasV an arcuateabutment 7 formed on its inner face, the ends 8 of the abutment beinginclined toward .the ilat intermediate surface 9 of said abutment.' Oneor more ports 1 0 can open through each inclined or deflecting end ofthe abutment and these can be in communication with pipes 11 one ofwhich can constitute an inlet for fluid to be compressed while the g@other constitutes the outlet for the compressed fluid. v

The.removable head 7 has a socket 12 constituting an end bearing for theshaft 3. Secured to this shaft between the heads 2 and 5 65 is a rotor13 one face of which is adapted to t snugly against the flat .surface 7of the abutment. A hub 14 is extendedfrom said surface of the rotor andabuts against head 5, its pe. riphery having a tight working lit againstthe inner arcuate surface of the abutment '7.

The rotor is provided with diametrically opposed radial slots 15extending therethrough from the periphery of the rot/or inwardly to theperiphery of hub 14. These slots are intersected by a deep circularchannel 16 formed in that face of the rotor nearest head 2. Thischannel, which is concentric with the rotor, provides a seat for acoiled spring 17 which bears at one end against head 2 and normallythrusts at itsgo other endagainst the inner end wall of the channel.

Slidable within each of the slots 15 is a plate 18' constituting a vane.Each plate extends from the inner wall of its slot outwardly to the pe-35 riphery of the rotor and that end of the plate or vane nearest head 2ls recessed at 19 so as to straddle the adjacent convolutions of spring17. Thus the one spring serves to hold both vanes normally pressedtoward head 5. Consequently, as the rotor 13 is operated, each vane willsuccessively ride over one inclined terminal 8 of. the abutment so as toplace the spring under compression, then along the flat surface 9 of theabutment and subsequently down the other inclined terminal 8 and alongthe head 5. Dur- `-ing this movement of each vane, fluid in advancethereof will'be expelled throughthe ports 10 rst reached bythe vane andas thesaid vane moves away from the other terminal of 10g the abutmentthe fluid to be compressed will be sucked through the port or ports insaid terminal and positioned behind the vane. By providing two vanes, asshown, a continuous stream of fluid can be delivered under pressure fromthe stator. `10;, It has been found in practice that a compressorconstructed as described can be made at low cost and will operateefficiently at a low speed. Importance is attached to the 'fact that itis made up of very few parts and vconsequently il.)

will seldom require repairs. All of the parts are lreadily accessible byremoving the head 5 and v in the event of excessive wear on the vanesthose parts can be easily removed without requiring` A device of theclass described including a stator having opposed heads, one of theheads being removable. arotor. having a hub on one face thrustingagainst the removable head, radial grooves extending into the rotor fromthe periphery thereof, there being a circular concentric channel in thatface of the rotor remote from thel removable head, said channelintersecting the grooves, there being a tight Working fit between theperipheries of the stator and the rotor, an arcuate abutment on theremovable head iltting snugly against the peripheral portion of thestator and having a tight working iit against the periphery of the hub,said abutment having a flat intermediate surface having workingengagement with one face'of the rotor,there being inclined terminals onthe abutment provided with inlet and outlet ports respectively, variesslidable in the slots and along the terminal and intermediate portionsof the abutment and along that portion of the removable head exposedbetween the terminals of the abutment, there-being a recess in each vaneregistering with the circular channel, and a spring seated in thechannel and recesses thrusting against one head of the statgr formaintaining a tight working t between. the removable head and itsabutment and the vanes.

GEORGE El. ROBERTS.

